摘要
为了提高光伏并网发电系统的输出效率,减小系统正常工作时的电压波动,提出了一种基于模糊控制的最大功率点跟踪方法。在分析了光伏电池的特性和几种光伏并网发电系统的最大功率点跟踪算法后,针对扰动观测法的不足,将模糊控制应用到最大功率点跟踪控制算法中,提出基于扰动观测法的模糊控制策略。在Matlab/Simulink中进行了系统的建模与仿真,结果表明该方法能快速跟踪外部天气变化,使光伏并网发电系统在最大功率点稳定工作,具有良好的动态、稳态性能。
In order to improve the efficiency of photovoltaic（PV） grid-connected system,and decrease the voltage fluctuation,a novel method of maximum power point tracking（MPPT） based on fuzzy control is proposed.Based on the analysis on characteristics of PV cell and several common MPPT algorithms of PV grid-connected system,a fuzzy MPPT control strategy based on the perturbation and observation（PO） method is proposed according to the shortage of（PO） method,in which fuzzy control method is introduced to MPPT algorithms.The model of photovoltaic grid-connected system is established and simulated by Matlab/Simulink.Simulation results show that the method can track the changes of the external weather rapidly,which make the photovoltaic grid-connected system run in maximum power point with good dynamic and static performance.
出处
《现代电力》
2011年第4期54-58,共5页
Modern Electric Power
关键词
模糊控制
扰动观测法
光伏并网系统
最大功率点跟踪
SIMULINK
fuzzy control
perturbation and observation method
photovoltaic grid-connected system
maximum power point tracking
Simulink
